JPH02233267A - Optical printer - Google Patents
Optical printerInfo
- Publication number
- JPH02233267A JPH02233267A JP1053753A JP5375389A JPH02233267A JP H02233267 A JPH02233267 A JP H02233267A JP 1053753 A JP1053753 A JP 1053753A JP 5375389 A JP5375389 A JP 5375389A JP H02233267 A JPH02233267 A JP H02233267A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- head
- printer
- light emitting
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 22
- 238000013459 approach Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
複数の発光素子を配列したプリンタ・ヘッドを備え、印
字データに基づいて該当する発光素子を駆動させること
で記録を行なう光プリンタ装置に関し、
簡単な構造で、各発光素子の温度のばらつきによる発光
素子の特性の変動に基づく濃度のばらつきの小さい信頼
性のある光プリンタ装置を提供することを目白勺とし、
前記プリンタ・ヘッドの温度を検出する温度検出部と、
非印字期間中に前記検出部が検出した温度に基づいて前
記プリンタ・ヘッドを一様に所定時間駆動させる印字及
び温度上昇用駆動部とを設けた構成である。[Detailed Description of the Invention] [Summary] The present invention relates to an optical printer device that is equipped with a printer head in which a plurality of light emitting elements are arranged and performs recording by driving the corresponding light emitting elements based on print data, with a simple structure, Our aim is to provide a reliable optical printer device with small variations in density due to variations in the characteristics of the light emitting elements due to variations in the temperature of each light emitting element, and the present invention includes a temperature detection section for detecting the temperature of the printer head; The printer head is configured to include a printing and temperature increase drive unit that uniformly drives the printer head for a predetermined period of time based on the temperature detected by the detection unit during the non-printing period.
（産業上の利用分野）
本発明は光プリンタ装置に係り、特に複数の発光素子を
配列したプリンタ・ヘットを備え、印字データに基づい
て該当する発光素子を駆動させることで記録を行なう光
プリンタ装置に関する。(Industrial Application Field) The present invention relates to an optical printer device, and more particularly, an optical printer device that is equipped with a printer head in which a plurality of light emitting elements are arranged and performs recording by driving the corresponding light emitting elements based on print data. Regarding.
近年、電子写真方式による光プリンタ装置はレーザ・プ
リンタ、ＬＥＤ （発光ダイオート）フリンタ、液晶プ
リンタと各種のものが開発されている。In recent years, various types of electrophotographic optical printer devices have been developed, including laser printers, LED (light emitting diode) printers, and liquid crystal printers.
これらのプリンタ装置は高速、高解像度、高画質の特徽
を有し、今後も大きく発展すると予想される。These printer devices are characterized by high speed, high resolution, and high image quality, and are expected to continue to develop significantly in the future.
本発明は上記プリンタ装置の内で主としてＬＥＤプリン
タ装置に関して説明する。The present invention will be mainly described with respect to an LED printer among the above-mentioned printer devices.
当該ＬＥＤプリンタ装置は従来多く使用されているレー
ザ・プリンタ装置と比較して、以下の特徴を有している
。The LED printer device has the following features compared to conventionally widely used laser printer devices.
すなわち、
■ 固体走査であって、機械的な駆動部品を必要としな
い。That is: (1) It is a solid-state scan and does not require mechanical driving parts.
■ 光路長を短くすることができ、装置を小型化するこ
とができる。- The optical path length can be shortened and the device can be made smaller.
■ 半導体技術の進渉により価格が安くなる。■ Prices will become cheaper due to advances in semiconductor technology.
今後、これらの特徴を生かし、特に小型プリンタにおい
て、ＬＥＤプリンタは多くなると考えられる。In the future, taking advantage of these features, it is thought that LED printers will become more popular, especially in small printers.
また、問題点としては ■ 個々のＬＥＤの出力が均一ではない。Also, the problem is ■ The output of individual LEDs is not uniform.
■ 温度により光出力が変化する。■ Light output changes depending on temperature.
■ 発光効率が大きくないため、大きな電源を必要とす
る。■ Requires a large power source because the luminous efficiency is not high.
■についてはＬＥＤ個々に発光時間を変え、あるいは、
４ＬＥＤ個々の電流を変える等の対策が考えられており
、各ＬＥＤの光出力を均一にすることが可能である。For ■, change the light emitting time for each LED, or
Countermeasures such as changing the current of each of the four LEDs have been considered, and it is possible to make the light output of each LED uniform.
■についてはＬ’Ｅ Ｄを数ノロックに分割して、発光
させることで電源容量を小さくする。または高効率の電
源を用いて、電源を小型にする等の対策がある。Regarding (2), the power supply capacity is reduced by dividing L'ED into several blocks and emitting light. Alternatively, there are countermeasures such as using a high-efficiency power source to make the power source smaller.
■が木発明で解決しようとする問題点である。■This is the problem that we are trying to solve with the invention of wood.
ＬＥＤは半導体素子であり、大きな温度依存性を持って
いる。例えば、ＧａＡｓＰを用いたＬＥＤでは一〇．８
％／ｄ昭程度の温度依存性を示す。ＬＥＤの温度が３０
゜Ｃ上昇すると、約２５％光出力が低下する。LEDs are semiconductor devices and have large temperature dependence. For example, in an LED using GaAsP, 10. 8
It shows temperature dependence on the order of %/d. LED temperature is 30
As the temperature increases, the light output decreases by approximately 25%.
このため、温度変化により変化記録濃度、ドット面積が
変化する。このことは通常の文字を出力する場合には、
あまり目立たないが、グラフィックあるいは、中間調記
録等の出力の時に問題となる。Therefore, the recording density and dot area change due to temperature changes. This means that when outputting normal characters,
Although it is not very noticeable, it becomes a problem when outputting graphics or halftone recording.
感光体もまた、温度により感度が変化する。このため、
温度変化に対して再現される記録濃度が変化する問題が
ある。The sensitivity of the photoreceptor also changes depending on the temperature. For this reason,
There is a problem in that the reproduced recording density changes with temperature changes.
（従来の技術）
従来、以上述べた温度変化に対応するため第７図に示す
ような光プリンタ装置があった。(Prior Art) Conventionally, there has been an optical printer device as shown in FIG. 7 in order to cope with the above-mentioned temperature changes.
本装置は同図に示すように、複数の発光素子が配列され
たプリンタ・ヘッド７１と、当該プリンタ・ヘッド７１
の温度を検出する温度検出部７３と、当該温度検出剖７
３により検出された温度に基づいて、前記プリンタへッ
ド７１に配列された全発光素子の各デューティ比（ｄｕ
ｔｙ；一定周期の時間内における発光印字時間の比）を
印字許容時において、一様に増大または縮小する印字及
びデューティ制御用駆動部７２とを有するものがあった
。As shown in the figure, this device includes a printer head 71 in which a plurality of light emitting elements are arranged, and a printer head 71 in which a plurality of light emitting elements are arranged.
a temperature detection unit 73 that detects the temperature of the temperature detection unit 7;
Based on the temperature detected by the printer head 71, each duty ratio (du
Some printers have a printing and duty control drive unit 72 that uniformly increases or reduces ty (ratio of light emitting printing time within a fixed period of time) when printing is permitted.
当該装置にあっては、前記温度検出部７３により検出さ
れた温度が予め定めた所定温度よりも高く、プリンタヘ
ッドの発光素子の光出力が低い場合には、前記印字及び
デューティ制御用駆動部７２に対し、プリンタ・ヘッド
７１に配列された全発光素子の印字許容時での発光時間
のデューティ比を増大させるように制御し、当該温度検
出部７３により検出された温度が予め定めた温度よりも
低い場合には、当該デューティ比を減少させるように制
御する。In this device, when the temperature detected by the temperature detection section 73 is higher than a predetermined temperature and the light output of the light emitting element of the printer head is low, the printing and duty control drive section 72 In contrast, the duty ratio of the light emission time of all the light emitting elements arranged in the printer head 71 when printing is permitted is controlled to increase, so that the temperature detected by the temperature detection section 73 is higher than a predetermined temperature. If the duty ratio is low, the duty ratio is controlled to be decreased.
ところで、従来の当該装置にあっては、前記温度検出部
７３により検出された温度に基づいて、前記プリンタ・
ヘッド７１にある全発光素子の印字時におけるデューテ
ィ比を前記印字及びデューティ制御部７２により制御す
るようにしているので、プリンタ・ヘッド７１全体の発
光素子の光出力を安定化させることはできるが、各素子
間の温度の変動に起因する光量のばらつきを解消するこ
とができない。By the way, in the conventional device, the temperature of the printer is determined based on the temperature detected by the temperature detection section 73.
Since the duty ratio of all the light emitting elements in the head 71 during printing is controlled by the printing and duty control section 72, the light output of the light emitting elements in the entire printer head 71 can be stabilized. It is not possible to eliminate variations in the amount of light caused by variations in temperature between each element.
このため、特にグラフィックまたは中間調記録等の出力
について濃度のばらつきが画質に悪い影響を与えるとい
う問題点を有していた。For this reason, there has been a problem in that variations in density have a negative effect on image quality, particularly in outputs such as graphics or halftone recording.
これは各発光素子は必ずしも一様に使用されるものでは
なく、使用される時間にばらつきがあり、使用される時
間が大きいものは温度が高く、使用される時間が小さい
ものは、温度が低いことになり、局所的な温度変化によ
る印字濃度の変化を解消することができないという問題
点を有していた。This is because each light emitting element is not necessarily used uniformly, and the time it is used varies, and those that are used for a long time have a high temperature, and those that are used for a short time have a low temperature. Therefore, there was a problem in that it was not possible to eliminate changes in print density due to local temperature changes.
また、デューティ比の制御は一般に回路が複雑になるお
それがあるという問題点をも有していた。In addition, duty ratio control generally has the problem that the circuit may become complicated.
一方、各発光素子毎に温度を検出して各発光素子の光量
を変えるように駆動制御することは、制御装置の構造が
複雑になるという問題点を有していた。On the other hand, detecting the temperature of each light emitting element and controlling the drive of each light emitting element to change the amount of light has a problem in that the structure of the control device becomes complicated.
そこで、本発明は以上の問題点を解決することを目的と
してなされたものであり、簡単な構造で、各発光素子の
温度のばらつきによる発光素子の特性の変動に基づく光
量ひいては濃度のばらつきの小さい光プリンタ装置を提
供することを目的としてなされたものである。Therefore, the present invention has been made with the aim of solving the above-mentioned problems, and has a simple structure, and has a small variation in light intensity and concentration based on variations in characteristics of light-emitting elements due to variations in temperature of each light-emitting element. This was made for the purpose of providing an optical printer device.
以上の技術的課題を解決するため本発明は第１図に示す
ように、複数の発光素子を配列したプリンタ・ヘッド１
を備え、印字データに基づいて該当する発光素子を駆動
させることで記録を行なう光プリンタ装置において、前
記プリンタ・ヘッド１の温度を検出する温度検出部３と
、非印字期間中に前記検出部３が検出した温度に基づい
て前記プリンタ・ヘッド１を一様に所定時間駆動させる
印字及び温度上昇用駆動部２とを設けたものである。In order to solve the above technical problems, the present invention has developed a printer head 1 in which a plurality of light emitting elements are arranged, as shown in FIG.
In an optical printer device that performs recording by driving a corresponding light emitting element based on print data, the temperature detecting section 3 detects the temperature of the printer head 1, and the detecting section 3 detects the temperature of the printer head 1 during a non-printing period. The printer head 1 is provided with a printing and temperature increasing drive unit 2 that uniformly drives the printer head 1 for a predetermined period of time based on the temperature detected by the printer.
本発明に係る光プリンタ装置は次のように動作する。 The optical printer device according to the present invention operates as follows.
当該プリンタ装置により印字を行うには、印字しようと
する印字データを前記印字及び温度上昇用駆動部２に入
力する。In order to perform printing using the printer device, print data to be printed is input to the printing and temperature increase drive unit 2.
すると、当該駆動部２は当該印字データに基づいて前記
プリンタ・ヘッド１の各発光素子の対応する素子を駆動
させて、記録用紙が供給されている場合等の条件が整っ
た印字許容時において、記録用紙に印字を行わせる。Then, the driving unit 2 drives the corresponding light-emitting elements of the printer head 1 based on the print data, and when printing is permitted when conditions are met, such as when recording paper is being supplied, Print on recording paper.
一方、当該駆動部２は記録用紙の供給等の印字条件が整
っていない非印字期間中においては、前記プリンタ・ヘ
ッド１の全発光素子を一様に発光させて各発光素子の温
度を上昇させることになる。On the other hand, during the non-printing period when printing conditions such as supply of recording paper are not in place, the driving unit 2 uniformly causes all the light emitting elements of the printer head 1 to emit light to increase the temperature of each light emitting element. It turns out.
ここで、「一様」とは全発光素子に対して、同一の強度
で同一の時間ということである。Here, "uniform" means the same intensity and the same time for all light emitting elements.
これによって、全発光素子に対して一定の熱が非印字期
間中に加わることになる。As a result, a certain amount of heat is applied to all the light emitting elements during the non-printing period.
当該熱が印字許容時に各発光素子に加えられる熱に比較
して無視できない熱量とすることにより、たとえ印字許
容時における発光時間の相違に基づく温度のばらつきが
各素子間にあったとしても、各素子毎の非印字期間中を
含めた全発光時間は相対的に同一長さの時間に近づくた
め、各素子間の温度のばらつきは小さなものになる。By making the amount of heat non-negligible compared to the heat applied to each light emitting element when printing is permitted, even if there is a temperature variation between each element due to the difference in light emitting time when printing is permitted, the amount of heat applied to each light emitting element is Since the total light emitting time including the non-printing period is relatively close to the same length, the temperature variation between each element is small.
非印字期間中に十分な熱量を加えるためには、例えば非
印字期間中における発光のデューティ比を印字許容時に
比較して十分に高くすれば良い。In order to apply a sufficient amount of heat during the non-printing period, for example, the duty ratio of light emission during the non-printing period may be made sufficiently higher than when printing is permitted.
以上の動作と並行して、前記温度検出部３はプリンタ・
ヘッド１の温度を検出し、当該温度が予め定めた温度値
を越える場合には、前記印字及び温度上昇用駆動部２は
非印字期間中における前記プリンタ・ヘッド１の全発光
素子に加えるべき熱量を減少させるように発光時間を短
縮させる。In parallel with the above operations, the temperature detection section 3
The temperature of the head 1 is detected, and if the temperature exceeds a predetermined temperature value, the printing and temperature increase drive section 2 detects the amount of heat that should be applied to all light emitting elements of the printer head 1 during the non-printing period. The light emitting time is shortened to reduce the
当該温度に達するまでは、非印字期間中において、全発
光素子を発光駆動させるようにする。Until this temperature is reached, all the light emitting elements are driven to emit light during the non-printing period.
以上により各発光素子の特性の温度依存に基づく濃度の
ばらつきを解消することができることになる。With the above, it is possible to eliminate variations in concentration due to temperature dependence of characteristics of each light emitting element.
次に、本発明の実施例について説明する。 Next, examples of the present invention will be described.
第６図に実施例に係る光プリンタ装置としてのＬＥＤプ
リンタ装置全体の概略を示す。FIG. 6 shows an outline of the entire LED printer device as an optical printer device according to an embodiment.
本装置は同図に示すように、金属基体上に感光層を設け
、一定の角速度で回転する円筒状の感光体６６と、気体
を正電荷または負電荷にイオン化して前記感光体６６に
吹きつけて感光体を帯電させる帯電器６８と、帯電した
感光体６６に印字データに基づいて、光を照射して電荷
を除去することにより感光体上に潜像を描く複数の発光
素子としての露光用ＬＥＤ （発光ダイオード）を配列
したプリンタ・ヘッド６１と、前記感光体６６の帯電部
分に当該電荷と逆の電荷を帯びた１−ナーを吹きつけて
前記潜像を現像する現像器６２と、当該像を記録する記
録用紙をセットする給紙カセット６３と、当該記録用紙
に現像した像を転写するために、当該用紙の背後を前記
帯電した１ヘナーと逆の電荷で帯電させることにより前
記帯電したトナーをクーロン力で引きつける転写器６４
と、当該記録用紙を前記感光体６６から分離する分離器
６５と、当該記録用紙に転写された前記トナーを定着す
る定着器６７と、スタッカ６９とを有する。As shown in the figure, this device includes a photosensitive layer provided on a metal substrate, a cylindrical photosensitive member 66 that rotates at a constant angular velocity, and a gas that is ionized into positive or negative charges and blown onto the photosensitive member 66. A charger 68 that charges the photoreceptor by applying light to the charged photoreceptor 66 based on print data, and exposure as a plurality of light emitting elements that draw a latent image on the photoreceptor by irradiating the charged photoreceptor 66 with light to remove the charge. a printer head 61 in which LEDs (light emitting diodes) are arranged; a developing device 62 that sprays a 1-toner having an opposite charge to the charged portion of the photoreceptor 66 to develop the latent image; A paper feed cassette 63 is used to set the recording paper on which the image is to be recorded, and in order to transfer the developed image to the recording paper, the back of the paper is charged with a charge opposite to the charged 1 hener. Transfer device 64 that attracts the toner with Coulomb force
, a separator 65 that separates the recording paper from the photoreceptor 66, a fixing device 67 that fixes the toner transferred to the recording paper, and a stacker 69.
本実施例は当該光プリンタ装置としてのＬＥＤプリンタ
装置の印字制御を行う部分に関するものである。This embodiment relates to a part that performs printing control of an LED printer device as the optical printer device.
第２図に本実施例に係る印字制御を行う部分を示す。FIG. 2 shows a portion that performs printing control according to this embodiment.
同図に示すように、本例に係る光プリンタ装置としての
ＬＥＤプリンタ装置は主に、前記複数の発光素子として
のＬＥＤを配列した前記プリンタ・ヘッド１に相当する
ＬＥＤへッド１１と、印字及び温度上昇用駆動回路１２
と、前記温度検出部３に相当するものであって前記ＬＥ
Ｄへット１１に設けられたサーミスタ１３ａ及びサーミ
スタ１３ａが温度検出した電気信号の増幅等の所定の処
理を行う温度検出回路１３ｂとを有する。As shown in the figure, the LED printer device as an optical printer device according to the present example mainly includes an LED head 11 corresponding to the printer head 1 in which LEDs as the plurality of light emitting elements are arranged, and an LED head 11 for printing. and temperature increase drive circuit 12
and corresponds to the temperature detection section 3 and the LE
It has a thermistor 13a provided in the D head 11 and a temperature detection circuit 13b that performs predetermined processing such as amplification of the electric signal detected by the thermistor 13a.
前記印字及び温度上昇用駆動回路１２は同図に示すよう
に、前記温度検出回路１３ｂの出力信号に基づいて印字
の許容を表す印字信号または切換え信号を出力するプリ
ンタ・コントローラ１２ｅと、印字の対象である印字デ
ータを格納ずるメモリ１２ｃと、肖該印字データに基づ
いて、前記ＬＥＤへッド１１の有するＬＥＤを駆動する
ための信号を出力する印字用回路１２ｂと、前記温度検
出回路１３ｂの出力に基づいて前記ＬＥＤへッド１１の
全ＬＥＤを一様に発光駆動させるための信号を出力する
温度上昇用回路１２ｄと、当該印字用回路１２ｂ及び前
記温度上昇用回路１２ｄの出力を切り換える信号切換え
器１２ａとを有する。As shown in the figure, the printing and temperature increase drive circuit 12 includes a printer controller 12e that outputs a printing signal or a switching signal indicating permission for printing based on the output signal of the temperature detection circuit 13b, and a printer controller 12e that outputs a printing signal or a switching signal indicating permission for printing based on the output signal of the temperature detection circuit 13b, and a memory 12c that stores print data, a print circuit 12b that outputs a signal for driving the LED of the LED head 11 based on the print data, and an output of the temperature detection circuit 13b. a temperature increase circuit 12d that outputs a signal for uniformly driving all the LEDs of the LED head 11 to emit light based on the above, and a signal switch that switches the outputs of the printing circuit 12b and the temperature increase circuit 12d. It has a container 12a.
次に本装置の動作を説明する。Next, the operation of this device will be explained.
ＬＥＤプリンタ装置の電源投入時の当該プリンタ装置の
動作を第３図に基づいて説明する。The operation of the LED printer device when the power is turned on will be explained based on FIG. 3.
前記サーミスタ１３．ａは前記ＬＥＤへッド１１の温度
を検出し、前記温度検出回路１３ｂを介して前記プリン
タ・コン１〜ローラ１２ｅ及び前記温度上昇用回路１２
ｄに当該温度を表す信号を送出する。The thermistor 13. a detects the temperature of the LED head 11, and connects the printer controller 1 to the roller 12e and the temperature increase circuit 12 via the temperature detection circuit 13b.
A signal representing the temperature is sent to d.
ＬＥＤプリンタ装置は種々の環境で利用されるため、電
源投入時の初期状態での温度も種々である。Since LED printer devices are used in various environments, the temperature in the initial state when the power is turned on also varies.
第３図に示すように、ＬＥＤへッド１１の温度が低い場
合には、前記温度上昇用回路１２ｄは前記ＬＥＤへッド
１１を発光駆動させるためのデータを出力し始めるとと
もに、前記プリンタ・コントローラ１２ｅはプリンタ電
源投入直後は非印字期間中であること及び前記ＬＥＤへ
ッド１１の温度が低いことにより、前記信号切換え器１
２ａに対して切換え信号を送出し、通常の印字用回路１
２ｂではなく、温度上昇用回路１２ｄを選択ずるように
する。As shown in FIG. 3, when the temperature of the LED head 11 is low, the temperature increase circuit 12d starts outputting data for driving the LED head 11 to emit light, and the temperature increase circuit 12d starts outputting data for driving the LED head 11 to emit light. The controller 12e switches the signal switching device 1 because the printer is in a non-printing period immediately after the power is turned on and the temperature of the LED head 11 is low.
A switching signal is sent to 2a, and the normal printing circuit 1
The temperature increasing circuit 12d is selected instead of the temperature increasing circuit 2b.
温度上昇用回路１２ｄの動作は全ＬＥＤをＯＮにすると
ともに、発光デューティを１００％の連続点灯にしてＬ
Ｅ．Ｄヘッド１１の温度を急速に上昇させる。The temperature increase circuit 12d operates by turning on all LEDs and setting the light emission duty to 100% continuous lighting.
E. The temperature of the D head 11 is rapidly increased.
ＬＥＤヘッド１１の温度が上昇して規定の温度に近づく
と、前記温度上昇用回路１２ｄは第３図に示すように前
記温度検出回路１３ｂからの信号に基づいて当該発光時
間を間欠にして、前記ＬＥＤへッド１１の温度を規定の
温度、すなわち４５°Ｃ〜５０°Ｃの範囲に保つ。When the temperature of the LED head 11 rises and approaches a predetermined temperature, the temperature increase circuit 12d makes the light emission time intermittently based on the signal from the temperature detection circuit 13b as shown in FIG. The temperature of the LED head 11 is maintained at a specified temperature, that is, in the range of 45°C to 50°C.
ここで、温度をこのような範囲に設定したのは、以下の
理由による。Here, the reason why the temperature was set within such a range is as follows.
一般に、装置の外部環境と装置内部の温度とは約１０°
Ｃの温度差があり、装置外部環境の最大値を３５°Ｃと
すると、ＬＥＤへッド１１の規定温度は４５°Ｃ乃至５
０°Ｃとすることが望ましいからである。Generally, the temperature outside the device and the temperature inside the device is approximately 10°
If there is a temperature difference between
This is because it is desirable to set the temperature to 0°C.
第４図に当該実施例に係るＬＥＤへッド１１の温度変化
をより詳しく示すように、ＬＥＤへッド１１がこの温度
より低い場合は前述の温度上昇用回路１２ｄによりＬＥ
Ｄへッド１１の温度をこの温度に保つことになる。As shown in FIG. 4, which shows the temperature change of the LED head 11 according to this embodiment in more detail, when the temperature of the LED head 11 is lower than this temperature, the temperature increase circuit 12d described above causes the LED head to rise.
The temperature of the D head 11 will be maintained at this temperature.
こうして、当該ＬＥＤプリンタ装置の前記定着器６７が
所定の温度にまで暖められる（ウ才一ム・アップ）まで
待ち、暖められた場合に初めて通常の印字動作が可能に
なる。In this way, the fixing device 67 of the LED printer device waits until it is warmed up to a predetermined temperature (heating up), and only when it is warmed up can normal printing operations become possible.
尚、発光時間を間欠にする代りに発光のデューティを１
００％から低下させることで規定温度に安定化させるこ
とでも可能である。In addition, instead of making the light emission time intermittent, the light emission duty can be set to 1.
It is also possible to stabilize the temperature at a specified temperature by lowering it from 00%.
通常の印字時については第５図に基づいて説明する。Normal printing will be explained based on FIG. 5.
記録用紙の供給がされて印字が可能になり、上位装置か
ら印字命令が送出された場合には、前記プリンタ・コン
トローラ１２ｅは印字を許容する印字信号（第５図（ｄ
））を前記印字用回路１２ｂに送出するとともに、非印
字期間中に前記温度上昇用回路１２ｄの出力が選択され
ていた前記信号切換え器１２ａに対して、印字用回路１
２ｂの出力を前記ＬＥＤヘッド１１の各ＬＥＤと接続す
べく切換え信号を送出する（第５図（ｅ））。When recording paper is supplied and printing becomes possible, and a print command is sent from the host device, the printer controller 12e sends a print signal (FIG. 5(d)) that allows printing.
)) to the printing circuit 12b, and the printing circuit 1
A switching signal is sent to connect the output of 2b to each LED of the LED head 11 (FIG. 5(e)).
第５図（ｂ）及び（Ｃ）に示すように、温度上昇用回路
１２ｄは前記温度検出回路１３ｂからの信号により前記
ＬＥＤへッド１１の温度が所定値以下の場合に当該ＬＥ
Ｄへッド１１の各ＬＥＤを発光させるための信号を出力
するものであるが、印字を許容する印字信号゛１′′
（第５図（ｄ））が出力されている場合には、前記信号
切換え器１２ａに対して前記プリンタ・コントローラ１
２ｅから前記温度上昇用回路１２ｄを選択すべき切換え
信号（第５図（ｅ））が出力されていないため、結果と
して前記ＬＥＤヘッド１１の各ＬＥＤには当該データは
送出ざれることばなく、印字が続行される。As shown in FIGS. 5(b) and (C), when the temperature of the LED head 11 is below a predetermined value, the temperature increasing circuit 12d detects the temperature of the LED head 11 by the signal from the temperature detection circuit 13b.
It outputs a signal to cause each LED of the D head 11 to emit light, and a print signal ``1'' that allows printing is used.
(FIG. 5(d)), the printer controller 1 is output to the signal switch 12a.
Since the switching signal (FIG. 5(e)) for selecting the temperature increase circuit 12d is not outputted from 2e, the data is not sent to each LED of the LED head 11 and is not printed. continues.
一方、プリンタ・コントローラ１２ｅから切換え信号（
同（ｅ））があったとしても、前記温度検出器１３ｂが
ＬＥＤヘッド１１の温度が一定値よりも高く当該ＬＥＤ
へッド１１の温度を上昇させる必要がない場合（同（＋
）） ）には、前記温度上昇回路１２ｄからは温度上昇
用データは出力されることはない。On the other hand, the switching signal (
Even if (e)) occurs, the temperature detector 13b detects that the temperature of the LED head 11 is higher than a certain value and the corresponding LED
When there is no need to increase the temperature of the head 11 (same (+
)) ), no temperature increase data is output from the temperature increase circuit 12d.
すなわち、前記ＬＥＤヘツ１く１１の各ＬＥＤに前記温
度上昇用回路１２ｄの出力結果が送出されて温度が上昇
する場合とは、前記温度検出回路１３ｂの出力が前記Ｌ
ＥＤへッド１１の温度が所定値よりも低い場合であって
、前記プリンタ・コン１−ローラ１２ｅから非印字期間
中を表す切換え信号が出力されている場合（同（ｆ））
に限られることになる。That is, when the output result of the temperature increase circuit 12d is sent to each LED of the LED head 11 and the temperature rises, the output of the temperature detection circuit 13b is
When the temperature of the ED head 11 is lower than a predetermined value, and when the switching signal representing the non-printing period is output from the printer controller 1-roller 12e ((f)).
It will be limited to.
本実施例はこのようにして、前記ＬＥＤへッド１１の各
素子の温度の安定化を図ることにある。The purpose of this embodiment is to stabilize the temperature of each element of the LED head 11 in this way.
尚、外部環境が高く、かつＬＥＤヘツ１く１１の温度が
高くなりすぎた場合には、前記温度検出回路１３ｂを介
して前記プリンタ・コントローラ１２ｅに当該温度を通
知させ、当該プリンタ・コントローラは前記ＬＥＤへッ
ド１１冷却用のファンを駆動させて強制冷却を行うこと
で、温度の安定化を行うことができる。Note that if the external environment is high and the temperature of the LED head 11 becomes too high, the printer controller 12e is notified of the temperature via the temperature detection circuit 13b, and the printer controller By driving the fan for cooling the LED head 11 and performing forced cooling, the temperature can be stabilized.
こうして、駆動された前記ＬＥＤへッド１１（６１）に
より前記感光体６６に潜像を作り、前述した現像器６２
により現像して記録用紙上に当該号を転写し、前記定着
器６７により像を定着させて印字が終了することになる
。In this way, a latent image is created on the photoreceptor 66 by the driven LED head 11 (61), and the above-mentioned developer 62
The issue is developed and transferred onto the recording paper, and the image is fixed by the fixing device 67 to complete printing.
以上説明したように、本発明は印字許容時にあっては通
常の印字を行うが、非印字期間中にあっては、前記プリ
ンタ・ヘッドの全発光素子な一様に発光駆動させて一律
に温度を上昇させるようにしているため、各発光素子間
の発光時間の差に基づく、温度のばらつきを解消して各
発光乗子の温度依存性による印字時の濃度のばらつきを
除去して信頼性のある光プリンタ装置を簡単な構造で提
供することができる。As explained above, the present invention performs normal printing when printing is permitted, but during non-printing periods, all the light emitting elements of the printer head are uniformly driven to emit light to uniformly control the temperature. This increases reliability by eliminating variations in temperature due to differences in light emission time between each light emitting element and eliminating variations in density during printing due to the temperature dependence of each light emitting element. A certain optical printer device can be provided with a simple structure.
第１図は発明の原理ブロック図、第２図は実施例に係る
ブロック図、第３図は実施例に係る電源投入時のシーケ
ンスを示す図、第４図は実施例に係るＬＥＤの温度変化
を示す図、第５図は実施例に係る光プリンタ装置の動作
を示す図、第６図は実施例及び従来例に係る光プリンタ
装置を示す図及び第７図は従来例に係るブロック図であ
る。
１（１１）・・・プリンタ・ヘッド（ＬＥＤヘッド）２
，１２・・・印字及び温度上昇用駆動回路３（１３ａ，
１３ｂ）・・・温度検出部（サーミスタ１３ａ、温度検
出回路１３ｂ）発ｅ昌 の 盾、ｔ１ つ゛ Ｏ・ン
フ 口第１図
貧流滑
１くイｆｒ．る盗』叡投ム峙のシーケンス吃示づＡ田ネ
ミ）蜂．Ａタ′１ｌく雁２，ＬＥＤ ら ９裏４Ａ翫
変ス乙乏ネでｒａ第
図Fig. 1 is a block diagram of the principle of the invention, Fig. 2 is a block diagram of the embodiment, Fig. 3 is a diagram showing the sequence when the power is turned on in the embodiment, and Fig. 4 is the temperature change of the LED according to the embodiment. FIG. 5 is a diagram showing the operation of the optical printer device according to the embodiment, FIG. 6 is a diagram showing the optical printer device according to the embodiment and the conventional example, and FIG. 7 is a block diagram of the conventional example. be. 1 (11)...Printer head (LED head) 2
, 12...Printing and temperature rise drive circuit 3 (13a,
13b)...Temperature detection section (thermistor 13a, temperature detection circuit 13b) shield, t1 ゛The sequence of the thief's attack is shown by A Tanemi) Bee. Ata '1l goose 2, LED et al.
Claims (1)
え、印字データに基づいて該当する発光素子を駆動させ
ることで記録を行なう光プリンタ装置において、 前記プリンタ・ヘッド（１）の温度を検出する温度検出
部（３）と、 非印字期間中に前記検出部（３）が検出した温度に基づ
いて前記プリンタ・ヘッド（１）を一様に所定時間駆動
させる印字及び温度上昇用駆動部（２）とを設けたこと
を特徴とする光プリンタ装置。[Scope of Claims] An optical printer device comprising a printer head (1) in which a plurality of light emitting elements are arranged, and performing recording by driving the corresponding light emitting elements based on print data, comprising: ); and a temperature detection unit (3) that detects the temperature of the printer head (1), which uniformly drives the printer head (1) for a predetermined period of time based on the temperature detected by the detection unit (3) during a non-printing period. An optical printer device characterized in that it is provided with a lifting drive section (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5375389A JP2739588B2 (en) | 1989-03-08 | 1989-03-08 | Optical printer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5375389A JP2739588B2 (en) | 1989-03-08 | 1989-03-08 | Optical printer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02233267A true JPH02233267A (en) | 1990-09-14 |
| JP2739588B2 JP2739588B2 (en) | 1998-04-15 |
Family
ID=12951571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5375389A Expired - Fee Related JP2739588B2 (en) | 1989-03-08 | 1989-03-08 | Optical printer device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2739588B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5784666A (en) * | 1995-01-06 | 1998-07-21 | Konica Corporation | Color image forming apparatus |
| US6266074B1 (en) * | 1998-10-22 | 2001-07-24 | Canon Kabushiki Kaisha | Light emitting apparatus with temperature control, exposure apparatus, and image forming apparatus |
| JP2010079170A (en) * | 2008-09-29 | 2010-04-08 | Fuji Xerox Co Ltd | Image forming apparatus and image forming program |
-
1989
- 1989-03-08 JP JP5375389A patent/JP2739588B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5784666A (en) * | 1995-01-06 | 1998-07-21 | Konica Corporation | Color image forming apparatus |
| US6266074B1 (en) * | 1998-10-22 | 2001-07-24 | Canon Kabushiki Kaisha | Light emitting apparatus with temperature control, exposure apparatus, and image forming apparatus |
| JP2010079170A (en) * | 2008-09-29 | 2010-04-08 | Fuji Xerox Co Ltd | Image forming apparatus and image forming program |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2739588B2 (en) | 1998-04-15 |
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